引用摘自：implicit（C# 参考）
仍以Student求和举例
class Student
{
/// <summary>
/// 语文成绩
/// </summary>
public double Chinese { get; set; }
/// <summary>
/// 数学成绩
/// </summary>
public double Math { get; set; }
}
不使用implicit 求和
class Program
{
static void Main(string[] args)
{
var a = new Student
{
Chinese = 90.5d,
Math = 88.5d
};
//a的总成绩 语文和数据的总分数
Console.WriteLine(a.Chinese + a.Math);
}
}
使用implicit
class Student
{
/// <summary>
/// 语文成绩
/// </summary>
public double Chinese { get; set; }
/// <summary>
/// 数学成绩
/// </summary>
public double Math { get; set; }
/// <summary>
/// 隐式求和
/// </summary>
/// <param name="a"></param>
public static implicit operator double(Student a)
{
return a.Chinese + a.Math;
}
}
求和：
class Program
{
static void Main(string[] args)
{
var a = new Student
{
Chinese = 90.5d,
Math = 88.5d
};
double total = a;
//a的总成绩 语文和数据的总分数
Console.WriteLine(total);
}
}